Pump Efficiency Calculator — multiplier per Water spent
Raw price doesn't tell you which pump is a good deal. Efficiency divides the multiplier a pump grants by what it costs, so you can see which upgrades buy the most click power per Water — and how each stage of the game compares.
24 / 24
| Lucky Clover | Start | ×12 | 300 Water | — | 100 |
| Sunflower | Start | ×30 | 3K Water | 2.5 | 26 |
| Volcanic Lava | Early game | ×300 | 70K Water | 2.4 | 12 |
| Electric | Start | ×125 | 30K Water | 2.5 | 11 |
| Ice Penguin | Late game | ×300K | 80M Water | 2 | 10 |
| Ocean | Start | ×50 | 15K Water | 1.67 | 9 |
| Jelly | Early game | ×500 | 150K Water | 1.67 | 9 |
| Golden | Early game | ×1.25K | 400K Water | 2.5 | 9 |
| Halloween Pumpkin | Late game | ×150K | 45M Water | 2.14 | 9 |
| Blue Mushroom | Late game | ×70K | 22.5M Water | 2.26 | 8 |
| Rainbow Candy | Mid game | ×3.1K | 1.25M Water | 2.48 | 7 |
| Amethyst | Late game | ×750K | 300M Water | 2.5 | 7 |
| Venom | Mid game | ×5K | 2.75M Water | 1.61 | 5 |
| Rocket | Endgame | ×1.88M | 1B Water | 1.88 | 5 |
| Demon | Mid game | ×12.5K | 10M Water | 2.5 | 3 |
| Dianeti | Endgame | ×4M | 15B Water | 2.13 | 1 |
| Water Pump | Start | ×1 | 0 Water | — | — |
| Water Pump Plus | Start | ×5 | Not verified | 5 | — |
| Ignisthul | Start | Not verified | Not verified | — | — |
| Unicorn Fantasy | Mid game | ×31K | Not verified | 2.48 | — |
| Cake | Late game | ×1M | Not verified | 1.33 | — |
| Mecha Kunka | Endgame | Not verified | Not verified | — | — |
| Saber | Endgame | Not verified | Not verified | — | — |
| UFO | Endgame | Not verified | Not verified | — | — |
Robux-exclusive pumps (Unicorn Fantasy, Cake) are excluded from price efficiency because no Water price exists for them. Data cross-verified 24 pumps · last checked 2026-08-29. See also the pump tier list.
Sources
- TechWiser — All Water Pumps in +1 Drain Water Per Clickthird-partyhttps://techwiser.com/1-drain-water-per-click-water-pumps/(accessed August 28, 2026)Full 21-pump table. IMPORTANT: its table traces to the same origin as the fan wikis (roonby.com, Aug 21) — one lineage, not independent corroboration. Used only for values that independent sources confirm.
- 1-drainwaterperclick.wiki — tier list & data hub (competitor wiki)third-partyhttps://1-drainwaterperclick.wiki/(accessed August 28, 2026)Pump roster, pet list, updates tracker. Used for cross-verification only.
Values on this page are only as reliable as their sources. See our methodology for how data is collected and verified.
How this tool works
- Each pump's efficiency is (multiplier − 1) ÷ its Water price — multiplier gained per Water spent.
- Scores are normalized 0–100 against the most efficient pump in the current roster.
- Sort by any column, filter by stage, or search a pump by name.
- Use it with the Best Pump Finder to check what you can afford right now.
FAQ
How is the efficiency score calculated?
Efficiency = (multiplier − 1) ÷ Water price, then normalized to 0–100 against the best pump in the roster. Early pumps like Lucky Clover score highest because their price is tiny relative to the multiplier jump — which is exactly why guides say to buy them immediately.
Why do early pumps dominate the score?
The score measures multiplier gained per Water. Early pumps cost hundreds while multiplying your clicks by 10×+, so they're mathematically the best deals. Endgame pumps still win on absolute power — that's why we show the stage filter too.
What does the 'jump' column mean?
It's how many times stronger each pump is than the previous pump in progression order (e.g. ×2.5 means 2.5× the previous pump's click value). Big jumps at a low price are the best buys.